I have a 00 jimmy w/ 4-12" eathquakes running off one 1501d thunder series mtx amp (all 0g wire), also have the 200amp alternator. And for some reason theres a really low constant hummin coming from my subwoofers, i ran my rca across from the power cable atlest 3ft across and some of the sound is gone, but most still there. i pretty sure its the ALT. Does anyone know how to stop the humming completely?